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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi everybody,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>I am starting with PDAL step by step, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I read an las file that I display with osg that work pretty well, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I want now make some optimization for loading and reloading my scene,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>My file testing is las with 25 000 000 points so I use:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>One reader, on which I use decimation filter, then Crop filter.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>All this step are quick, but when I use sequentialIterator and read function I can take a coffee break.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>That is a big problem for me, cause I want to reload my scene with different decimation factor or different Bounds.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>And each time all las is read.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><br>Is there any method for read only a part of file? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Any way to produced spatial index ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Regards<o:p></o:p></span></p></div></body></html>